According to Page Six, the punch was thrown after Bloom refused to shake Bieber’s hand. Bieber than allegedly then taunted Bloom about his ex-wife Miranda Kerr, remarking “She was good.”

In 2012, Bieber was seen cozying up to Bloom’s then wife backstage as the Victoria’s Secret Fashion Show. More recently, Orlando was spotted hanging out with Bieber’s on-and-off girlfriend Selena Gomez.

That’s when Bloom allegedly took a swing at Bieber, which led the crowd to cheer. The punch was not captured in the video, via TMZ, below. Bieber then reportedly said to Bloom, “What’s up b–ch,” before the two were separated by their entourages.

In a real jerk move, Bieber later Instagrammed a photo of Kerr in a bikini before taking it down.

So yes, what we’re saying is, their little tiff might in fact be over a girl. Boys will apparently be boys, no matter how famous they are.